Hi ken! No, seedlings have no names because they are the own original DNA..just like your kids are not you. The ones that I have, that are really different, can be registered with the Plumeria Society as a new Culitvar. I am putting together the information for them now. If they agree and put them on their Registered List of Plumeria's, making them a "named plant".
What they do is use a well rooted NOID, cut it off at the base, then graft a hard to root Named Plant instead of trying to root it. most of my exotics I have purchased at the PSA sales have been done that way.